Profile: Sapphire Engineering, Inc. is engaged in ultrahard material manufacturing such as sapphire, ruby, and ceramics - including alumina and zirconia variants. We hold tolerances as small as 0.00001″ in these materials and surface finishes down to 0.25 microinch (Ra). We also manufacture the highest quality, tightest tolerance pistons and piston assemblies. We offer a comprehensive array of machining services, specializing in complex, burr-free, high-precision turning, milling and processing of high-performance engineering thermoplastics and corrosion-resistant metals.